Rotary printing-machine.



N6. 856.079. PATENTED JUNE 4, 1907.

E. MERTBNSL ROTARY PRINTING MACHINE.

APPLIQATION FILED JAN.26, 1907.

l f; 2 h il I If a I e9 f t 7 g x 5 t b W 2: WITNESSES 6 INVENTOR ATTGRNEYS rarrnn sira'rne Parana" rrren EDUARD MERTENS, or caossamnaaarniinn, NEAR B RLIN, GERMANY;

ROTARY PRINTENQ-MACi-HNE- Specification of Letters Patent.

Patented June 4, 1 907.

Application filed January 26, 1907. Serial No. 354,202.

' machines by which designs or patterns of desired sort are printed up'on calicoes, wall papers, the paper, textile fabric, or the like, which is to be printed is pressed as far as possible into the depressions of the engraved surface' For this purpose soft strips of cloth running with the paper or the like through the machine or a pliant resilient covering on the press-roll which carries and drives the aper. is generally used. These methods lowever are attended with great disadvan- .tagcs.

Strips of cloth with a seam leave the mark of the scam upon the iinished product when more delicate fabrics are printed. Seamless strips of clothare also unpractical for a similar reason since the structure of the cloth is apparent upon thefinished product if line goods are being printed. Covering the cloth with caoutchouc or the like to give it a smooth surface is also unsatisfactory as well as expensive, because when the coat is thin it soon assumes the structure of the cloth, and when it is heavy it is easily injured by folds or otherwise and the injuries are conspicuous upon the final product after the printing. Covering the-prcss-roll with cloth, etc., is attended with disadvantages in a still higher degree. Where a covering of caoutchouc for the cloth is used the rollers must be frequently withdrawn for replenishing or smoothing out, whereby much time is lost and expense incurred. Furthermore, the elastic material must be turned in a lathe dr by means of special devices on the machine itself, which adds to the expense and inconvenicnce of this style of apparatus.

These defects are remedied by my machine in which the material which-is to be printed is not carried directly by the pressroll as is usual, but by one or more secondary yielding rollers, i. c. rollers provided with a rcsilienfcover, which are inserted between the press-roll and the cylinder. The followcured: The roller provided with the resilient ing important advantages are thereby se,

cover, which is preferably of smaller diameter than the printing cylinder and the pressroll, may be readily exchanged for one of a (ilifQT- cut width where goods of a different width are to be printed. It maybe easily removed and repaired when in ured. The layer of;

supple material, for example caoutchmrc,

which is relatively very thick, affords a. very elastic pressure and permits of a deeper de-. pression of the paper or fabric to be printed into the engraved surf ace of the printing r inder. Again, the rollers being providedwith a resilient surface ailordya much greater protection against injuries to the fabric printed than the coverings of press-rolls and strips of cloth which are in general use, because of the thickness of the resilient layer,

and its greater elasticity. When. printing quickly, it 1s not only a narrow hue across the paper etc, which contacts with the prii1t-' mg cylinder, but the resilient surlace of the roller is flattened against the printing cyhnder and thereby presses the paper against a broader segment of the cylinder, and thereby insures the taking up of the color from its engraved surface.

in order to increase the pressure and to dim-inish the consumption of power, instead of one secondary roller with a resilient cover, two or more of such rollers may be inserted between the printing cylinder and the pressroll.

In order that the invention may be more clearly understood, reference is made to the accompanying drawing in which one form of a machine of this kind is represented in its essential parts by way of example, and in which;

Figure l is a front elevation, and Fig. 2 is a vertical section through the machine.

Qimilar letters of reference refer to similar parts in both views.

The printing cylinder tl' whieh is etched or engraved in the customary manner is journaled in dsuitable frame 2, and is adapted to be rotated in a suitable manner in the direction of the arrow shown in Fig. 2. The colordoctor 1' lies against the printing cylinder and removes the superfluous color therefrom. The roller c for applying the color is arranged under the printing cylinder d and dips into the color trough e and transfers the color to the cylinder. 'Above the cylinder cl are situated two secondarv rollers 12, b, which are Q, seep'ze eecl' provided with a resilient cover and which are free to move in e vertical direction; they are pressed against the printing cylinder or against one another b y the upper main press-roll (t which, in the printing machines customarily used is provided with n resilient covering and presses the material to be printed against the printing cylinder either directly or indirectly with a running strip of cloth interposed.

The material which is to be printed may be fed to the printing cylinder in various ways. It 111ay,'for example, be passed from f between the printing cylinder and the low er secondery roller 7) and then conducted further to g. Secondly, the material may be passed from 71 between the two secondaryrollers, around the lower roller 6 and through between this end the cylinder Z to w. "lhirdly, the material may be guided so that it runs from (1 between the cylinder d and the bottom roller Z) around this, between the two secondary rol wrs, around the upper roller 11,

through between the letter and the press-roll and around the latter to 7). A fourth \ray is such that the material runs from it between the cylindcrd and the lower roller l), around the latter and through between the two sce ondary rollers to i. Fifthly, the material. may be passed "[roin s between the press-roll a and the upper roller Z),-nround the latter,

through. between the two secondary rollers,

around the lower roller b and through between this and the cylinder t.

1 claim as my invention:

1. In a, rotary printing machine, the coinhinetion of e frame, a rotary printing c 'l.in-- der mounted thereon, a rotary pressroll, and a secondary rotary resilient press roller of smaller diameter intermediate said printing cylinder and said press-roll .i'or thepurpose specified. I

2. in a rotary printing machine, the cone bination of a frame, a rotary printing cylinder mounted thereon, a rotary press-roll, and a secondary rotary press roller of smaller diameter provided with a resilient cover intermediatesztid printing cylinder and said pressroll, l'or the purpose specified.

3. In a. rotary printing nnrchine, the combination of a lrmnc, a rotary printing cylinder imiuntcd thereon, n rotary press-roll, and a plurality ol secondary rotary press rollers of smaller diameter intermediate said printing eylinr'lcr and said press-roll, for the pur pose specified. it

in t stimony whereof I have signed niy name to this specification, in the presence of two subscribing witnesses.

EDUARD MERTENS.

Witnesses Jonn's'nns HEIN, Woiininuiiz liAL-TT. 

